Cathedral of Huesca, built over the former mosque, is an interesting mish-mash of styles with late Gothic doorways and a Renaissance carved alabaster altarpiece by Damian Forment.
The Casino in the centre of town is Modernista Art Nouveau with interesting interiors which can be visited, and a bar.
The City Hall, with contains the famous "Cuadro de la Campana" painting, regarding the homonymous historic event.
Miguel Servet Park, the largest park of the city, with several interesting buildings and statues like the Origami birds statue and a replica of the Snow White and the seven dwarfs house.
The monastery of San Pedro el Viejo, famous by its romanesque cloister.
El Coso, the major street that surrounds the old town.
The Olimpia hall, Huesca's main theatre.
Huesca's bullring
Other churches: San Vicente, San Lorenzo, San Miguel...
Huesca museum
The San Jorge hill and hermitage pilgrimage when the San Jorge's day, patron saint of Aragon
Other hermitages placed in Huesca's surrounding villages: Salas, Loreto etc.
The city walls, now in process of restoration.